On Tue, Dec 03, 2024 at 11:20:50AM +0100, David Hildenbrand wrote: > In the near future, we want to have a single way to handover PageOffline > pages to the buddy, whereby they could have: > > (a) Never been exposed to the buddy before: kept PageOffline when onlining > the memory block. > (b) Been allocated from the buddy, for example using > alloc_contig_range() to then be set PageOffline, > > Let's start by making generic_online_page() less special compared to This got me confused for a moment. I'd have said "making __free_pages_core" less special? As that is where we were calling debug_pagealloc_map_pages() if the context on the context. > ordinary page freeing (e.g., free_contig_range()), and perform the > debug_pagealloc_map_pages() call unconditionally, even when the online > callback might decide to keep the pages offline. > > All pages are already initialized with PageOffline, so nobody touches > them either way. > > Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > Cc: Oscar Salvador <osalvador@xxxxxxx> > Signed-off-by: David Hildenbrand <david@xxxxxxxxxx> Acked-by: Oscar Salvador <osalvador@xxxxxxx> -- Oscar Salvador SUSE Labs
